how to apply operations (like multiplication) to character array?

how to apply operations (like multiplication) to character array like A=[a b c d] such that if i want to multiply the first element (a) in that array (A) to be finally appeared like that [a^2,ab,ac,ad] and then if i want to substitute the characters with any number like as : if a=2 then a^2=4 ,and if c=-3 then ac=-6 . thank you in advance

Answer 1

[Star Strider]

What you describe, requires the Symbolic Math Toolbox.

[Guillaume]

... and has nothing to do with what matlab calls character arrays (also known as strings)

A = 'thisisacharacterarray';

[mohammad]

my friend , i don't need to know what my description requires ,i need to know what i have to do by requirement . thanks

[Walter Roberson]

Are you asking how to re-implement the Symbolic Toolbox, or are you asking for us to point you to the Symbolic Toolbox User Guide, or are you asking us to do your homework for you?